/Engine/Source/Runtime/Engine/Classes/PhysicsEngine/ClusterUnionComponent.h
Returns BodyInstance of the component.
Returns the BodyInstance based on various states (does component have multiple bodies? Is the body welded to another body?)
virtual [FBodyInstance](API\Runtime\Engine\PhysicsEngine\FBodyInstance) * GetBodyInstance ( [FName](API\Runtime\Core\UObject\FName) BoneName, bool bGetWelded, int32 Index ) const